linux-kernel - Re: [PATCH 1/6] drm/bridge: analogix: remove unused struct 'bridge

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Date: Mon, 20 May 2024 12:57:36 +0000
From: "Dr. David Alan Gilbert" <linux@...blig.org>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc: andrzej.hajda@...el.com, neil.armstrong@...aro.org,
	maarten.lankhorst@...ux.intel.com, daniel@...ll.ch,
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/6] drm/bridge: analogix: remove unused struct
 'bridge_init'

* Dmitry Baryshkov (dmitry.baryshkov@...aro.org) wrote:
> On Sun, May 19, 2024 at 10:43:44PM +0000, Dr. David Alan Gilbert wrote:
> > * Dmitry Baryshkov (dmitry.baryshkov@...aro.org) wrote:
> > > On Sat, May 18, 2024 at 12:24:27AM +0100, linux@...blig.org wrote:
> > > > From: "Dr. David Alan Gilbert" <linux@...blig.org>
> > > > 
> > > > 'bridge_init' is unused, I think following:
> > > > commit 6a1688ae8794 ("drm/bridge: ptn3460: Convert to I2C driver model")
> > > > (which is where a git --follow finds it)
> > > > Remove it.
> > > 
> > > Please rephrase the commit message following guidelines in
> > > Documentation/process. Use Fixes tags if suitable.
> > 
> > I specifically don't want to use Fixes in these set because
> > there's no need for someone to backport this to older
> > kernels that use the original, and many backporters
> > use 'Fixes' as an automated means to find stuff they should
> > backport.
> > 
> > Other than that, is there something specific you think I've
> > missed?
> 
> It's not about missing things. It's about a way it is written.
> Consider something like:
> 
> The commit aaaaaaa ("drm/bridge: foo bar") has dropped all the users of
> the struct bridge_init from the exynos_dp_core, while retainng unused
> structure definition. Later on the driver was reworked and the
> definition migrated to the analogix_dp driver. Remove unused struct
> bridge_init definition.

OK, v2 sent with text close to that.

> 
> > 
> > (I'm also purposely being less certain here, because --follow
> > is showing it in a ptn3460 and I don't quite follow
> > why that changes it here).
> 
> The mentioned commit is a correct one. Historically exynos_dp_core had
> been creating the ptn3460 bridge manually. Later on this was fixed in
> the ptn3640 driver and the code was dropped from exynos_dp_core.

Ah OK; remember I don't know the actual structure of these devices
or the history.

Dave

> > 
> > Dave
> > 
> > > 
> > > > 
> > > > Build tested.
> > > > 
> > > > Signed-off-by: Dr. David Alan Gilbert <linux@...blig.org>
> > > > ---
> > > >  drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 5 -----
> > > >  1 file changed, 5 deletions(-)
> > > > 
> > > > diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> > > > index df9370e0ff23..1e03f3525a92 100644
> > > > --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> > > > +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> > > > @@ -36,11 +36,6 @@
> > > >  
> > > >  static const bool verify_fast_training;
> > > >  
> > > > -struct bridge_init {
> > > > -	struct i2c_client *client;
> > > > -	struct device_node *node;
> > > > -};
> > > > -
> > > >  static int analogix_dp_init_dp(struct analogix_dp_device *dp)
> > > >  {
> > > >  	int ret;
> > > > -- 
> > > > 2.45.1
> > > > 
> > > 
> > > -- 
> > > With best wishes
> > > Dmitry
> > -- 
> >  -----Open up your eyes, open up your mind, open up your code -------   
> > / Dr. David Alan Gilbert    |       Running GNU/Linux       | Happy  \ 
> > \        dave @ treblig.org |                               | In Hex /
> >  \ _________________________|_____ http://www.treblig.org   |_______/
> 
> -- 
> With best wishes
> Dmitry
-- 
 -----Open up your eyes, open up your mind, open up your code -------   
/ Dr. David Alan Gilbert    |       Running GNU/Linux       | Happy  \ 
\        dave @ treblig.org |                               | In Hex /
 \ _________________________|_____ http://www.treblig.org   |_______/